package mylittleinvestigations;

/**
 * Allows JAR archives to be read and decompressed on-the-fly via the VFS.
 *
 * @author dawnmew
 * @since 1.0
 *
 * Licensed under the MIT License.
 *
 * Copyright (c) 2012 dawnmew
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

import java.io.InputStream;
import org.dawnmew.jvirtualstream.VirtualFileSystemSource;
import org.dawnmew.simplejar.JarReader;

public class JarVirtualFileSystemSource implements VirtualFileSystemSource
{

    private JarReader jarReader = new JarReader();
    private static JarVirtualFileSystemSource instance = null;

    public static JarVirtualFileSystemSource getInstance()
    {
        if (instance == null)
        {
            instance = new JarVirtualFileSystemSource();
        }
        return instance;
    }

    public void openArchive(String filename)
    {
        jarReader.openArchive(filename);
    }

    public boolean isValid()
    {
        return jarReader.isValid();
    }

    public InputStream getInputStream(String filename)
    {
        return jarReader.getInputStream(filename, true);
    }

    public void close()
    {
        jarReader.close();
    }
}
